How Long Will the EcoFlow River 2 Max Run an Aquarium Heater (100W)?
Updated 2026-10-17 · Yes
The numbers
| Battery capacity | 512Wh (LFP) |
|---|---|
| Usable energy | 435Wh (85% via AC outlets) |
| Continuous AC output | 500W |
| Surge rating | 1000W |
| Aquarium heater (100W) running watts | 100W |
| Startup watts | 100W |
| Average draw | 40W |
| Estimated runtime | 11 hours |
| Energy per day of typical use | 960Wh |
512Wh × 0.85 = 435Wh usable ÷ 40W average = 10.9 hours
Station specs: source, checked 2026-10-17. See how we calculate runtime.
Adjust the numbers
Check the label on your aquarium heater (100W) and enter its real wattage.
Recharging with solar
The EcoFlow River 2 Max accepts up to 220W of solar input. In real conditions that harvests about 825Wh on a sunny day (5 peak-sun hours), or about 750Wh with one 200W panel.
Solar can’t fully keep up. An aquarium heater (100W) uses about 960Wh a day at 24 hours of use, more than the EcoFlow River 2 Max’s best-case solar harvest. Solar will stretch the runtime but not sustain it.
Tips
- Aquarium heaters cycle with their thermostat. Add an air pump (5–10W) to keep fish oxygenated during an outage.
- You’ll still have about 400W of AC capacity left for other devices at the same time, though they’ll share the same battery.
- The EcoFlow River 2 Max uses LiFePO4 (LFP) cells, rated for thousands of cycles, so running it down daily won’t wear it out quickly.
Other power stations running an aquarium heater (100W)
| Power station | Capacity | Output | Runtime | Verdict |
|---|---|---|---|---|
| Jackery Explorer 300 Plus | 288Wh | 300W | 6.1 hours | Yes |
| Goal Zero Yeti 500X | 505Wh | 300W | 11 hours | Yes |
| Anker 535 PowerHouse | 512Wh | 500W | 11 hours | Yes |
| DJI Power 500 | 512Wh | 1000W | 11 hours | Yes |
| Jackery Explorer 500 | 518Wh | 500W | 11 hours | Yes |
| EcoFlow River 2 Pro | 768Wh | 800W | 16 hours | Yes |
| Anker SOLIX C800 Plus | 768Wh | 1200W | 16 hours | Yes |
| Bluetti AC70 | 768Wh | 1000W | 16 hours | Yes |
FAQ
Will the EcoFlow River 2 Max run an aquarium heater (100W) overnight?
Yes. Eight hours uses about 320Wh, roughly 74% of the EcoFlow River 2 Max’s usable capacity.
How long does the EcoFlow River 2 Max take to recharge with solar?
With its maximum 220W of solar input it refills in about 3.1 hours of strong sun. With a single 200W panel, expect about 3.4 hours of full sun.